method of obtaining coal

Commonly used mining techniques to extract coal IEA ...

25/01/2018  As mining of coal depends on the depth and quality of the coal seams, different techniques are used to dig the deposits. Surface mining and deep underground mining are the two main methods of mining coal. Depth, density, and thickness of the coal seam are the factors that are taken into account while selecting the mining method for coal extraction. However, many coals extracted by using these ...

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Method of obtaining activated coal

Method of obtaining activated coal. C01B31/14 - Granulation. C01B31/08 - Active carbon. FIELD: chemistry. SUBSTANCE: method includes mixing coffee cake, formed in the process of instant coffee production, with condensed pyrolysis resins, which have carbon content higher than 65%, and carbonised material, which has content of carbon over 80%. Mixture is granulated, dried and subjected to ...

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Method of obtaining coal particularly strong silicate ...

Request PDF On Dec 30, 2015, Pashchenko S.E and others published Method of obtaining coal particularly strong silicate membranes for environmentally friendly combustion of a new type of lump ...

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The method of obtaining coal briquettes

A method of obtaining coal briquettes, whereby heated to 250 o C bituminous binder serves to wet the coal is heated to 90-95 o C, mixed, and the resulting mixture bitteroot. In g the AET binder, that allows you to improve the quality of the briquettes and to reduce the consumption of binder. The disadvantages of the method are the necessity of using only moisture heated coals, as well as the ...

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RU2471708C1 - Method of obtaining active coal - Google

Method of active coal obtaining includes impregnation of coal base grains, representing active coal, which contains 1.0-1.5 wt %, potassium, and has volume of sorbing pores 0.5-0.6 cm 3 /g. Impregnation is performed with solution with temperature 40-55°C, containing salts of copper, chrome, silver and triethylene diamine. Substances are contained in solution with their weight ratio (4.5-7.0 ...

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Coal mining - Wikipedia

Coal extraction methods vary depending on whether the mine is an underground mine or a surface (also called open cast) mine. Additionally coal seam thickness and geology are factors in selection of a mining method. The most economical method of coal extraction for surface mines is the electric shovel or drag line. The most economical form of underground mining is the long wall, which is a ...

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The method of obtaining coal briquettes

A method of obtaining coal briquettes, whereby heated to 250 o C bituminous binder serves to wet the coal is heated to 90-95 o C, mixed, and the resulting mixture bitteroot. In g the AET binder, that allows you to improve the quality of the briquettes and to reduce the consumption of binder. The disadvantages of the method are the necessity of using only moisture heated coals, as well as the ...

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Coal National Geographic Society

22/12/2012  Longwall mining is one of the oldest methods of mining coal. Before the widespread use of conveyor belts, ponies would descend to the deep, narrow channels and haul the coal back to the surface. Today, almost a third of American coal mines use longwall mining. Outside the U.S., that number is even higher. In China, the world’s largest coal producer, more than 85% of coal is exracted

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The method of obtaining coal-water fuel

A method of obtaining coal-water fuel from coal, including dry crushing coal to the size of the pellets 6 mm, wet fine grinding to obtain a suspension with a particle size of 20 μm at a mass ratio of solid particles water 35 o C65 60 o C40, joint grinding of this suspension by crushing coal ratio 46 o C54 75 o C25 to obtain a coarse fraction with a particle size of 60 to 30 μm (1). The ...

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The method of obtaining coal-water slurry

A method of obtaining coal-water slurry with the addition - condensation products of arilpirolului, alkylphenolates, alkylarylsulfonates acid or mixtures thereof with formaldehyde (U.S. patent 4457762, MKI With 10 L 1/32). The condensation product is added in a quantity sufficient to reduce the viscosity and is used in the form of acid, and in the form of salts. The disadvantage of this method ...

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Preliminary Study of a Method for Obtaining Brown Coal

30/03/2019  A purpose of the research was to develop a method for the preparation of novel organo-mineral fertilizers with the use of brown coal and biochars as organic additives. Brown coal was blended simultaneously together with inorganic materials used for the process of urea superphosphate production in a laboratory scale using a pan granulator and in larger scale using a rapid mixer granulator.

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The method of obtaining coal-tar pellets for activated

The method of obtaining coal-tar pellets for activated carbon. C01B31/14 - Granulation (57) Abstract: Usage: for producing granulated coal-resin compositions used in the production of active carbons. The inventive method includes the offset of the carbon-containing raw material with drevesnosmolyanoy binder and subsequent granulation of the mixture, pre-assess the reactivity of wood-resin ...

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US20150083570A1 - Method of Obtaining a High

The present disclosure provides methods and systems for coal liquefaction and obtaining a high quality coke from a low rank coal extract. A method of obtaining a high quality coke from a low rank coal extract may include exposing coal to a hydrogenated vegetable oil in the presence of a coal-derived solvent to form a slurry, elevating the temperature of the slurry to facilitate liquefying the ...

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What are two methods used to mine coal out of the

Two methods used to remove coal from the ground are: Surface Mining: Surface mining is used when the coal is located within 200 feet of the surface.Large machines are used to remove soil and rock ...

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Coal mining - Prospecting and exploration Britannica

Coal mining - Coal mining - Prospecting and exploration: The fundamental objective of coal prospecting is to discover coal resources through a search. In areas where coal mining has not been previously practiced, the search process should result in obtaining coal samples that give reasonable evidence of the existence of a coal seam. Once a seam has been discovered, considerable further

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Method of obtaining coal particularly strong silicate ...

Request PDF On Dec 30, 2015, Pashchenko S.E and others published Method of obtaining coal particularly strong silicate membranes for environmentally friendly combustion of a new type of lump ...

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Coal National Geographic Society

22/12/2012  Longwall mining is one of the oldest methods of mining coal. Before the widespread use of conveyor belts, ponies would descend to the deep, narrow channels and haul the coal back to the surface. Today, almost a third of American coal mines use longwall mining. Outside the U.S., that number is even higher. In China, the world’s largest coal producer, more than 85% of coal is exracted

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Coal extraction - Eniscuola

The first method consists in extracting coal while leaving “pillars” to support the roof of the mine. The second method envisages the use of a series of supporting structures called “scaffoldings” which can be easily removed and support the roof in the mining area. While the extraction goes on, the scaffoldings are removed and the roof collapses. The two methods differ in terms of ...

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Method of Obtaining a High Quality Coke from Low Rank

A method of obtaining a high quality coke from a low rank coal extract may include exposing coal to a hydrogenated vegetable oil in the presence of a coal-derived solvent to form a slurry, elevating the temperature of the slurry to facilitate liquefying the coal and liberating a volatile matter, separating the insoluble components from the slurry to obtain a de-ashed coal extract that is ...

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Surface mining _____. is more destructive than underground ...

11/05/2018  Surface mining _____. is more destructive than underground mining is a method of obtaining coal is a method of obtaining natural gas permanently destroys the environment. Surface mining: is more destructive than underground mining. s. Expert answeredyumdreaPoints 43071 Log in for more information. Question . Asked 5/11/2018 1:20:46 PM. 0 Answers/Comments. This answer

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Method of continuously producing compression

Abstract. This patent describes a method of producing a continuous cake of compression molded coal for chamber type coke ovens comprising steps of charging raw material coking coal into a molding box, and pressurizing the raw material coking coal with a pressing plate to obtain compression molded coal and to push the compression molded coal out of the molding box through an outlet.

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Surface mining _____. is more destructive than underground ...

Surface mining _____. is more destructive than underground mining is a method of obtaining coal is a method of obtaining natural gas permanently destroys the environment. LOGIN TO VIEW ANSWER. Do you know the better answer! Submit your answer. Related Questions in Geography. Asked By adminstaff @ 24/07/2019 10:43 PM. Geography . 1 Answers. Tropical rainforests make up what

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(PDF) COAL MINING METHODS - ResearchGate

The mining method selected for exploitation is determined mainly by the characteristics of the coal deposit and the limits imposed by safety, technology, environmental concerns, and economics ...

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What are two methods used to mine coal out of the

Two methods used to remove coal from the ground are: Surface Mining: Surface mining is used when the coal is located within 200 feet of the surface.Large machines are used to remove soil and rock ...

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